I am not able to use Antpool, whether I try with my S9, S7, or L3+. I am mining just fine elsewhere though. I have never had this problem before. Weird.
Out of the gate, I had the exact same issue. Proper settings, but my hashing rate never registered on their dashboard. And this is not to contrary on the Antpool, thread, "the other LTC pool" worked immediately, so I've obviously had no reason to switch back. Seeing this post though will drive me to find out why know though....